Introduction to the Navigation Bridge: Jintang Bridge started construction in April 2006 and was officially opened to traffic on November 22, 2009. It includes the main navigation bridge, the east navigation bridge, the west navigation bridge, and the non-navigation bridge. The bridge, the shallow water area approach bridge, the Jintang side approach bridge, and the Zhenhai side approach bridge are the longest of the five main bridges in the Zhoushan mainland island-connecting project. It is also the third in China after the Qingdao Jiaozhou Bay Bridge, the Hangzhou Bay Cross-sea Bridge, and the Donghai Bridge. Four long sea-crossing bridges.